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Btrfs: fix regression in scrub path resolving

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In commit 4692cf58 we introduced new backref walking code for btrfs. This
assumes we're searching live roots, which requires a transaction context.
While scrubbing, however, we must not join a transaction because this could
deadlock with the commit path. Additionally, what scrub really wants to do
is resolving a logical address in the commit root it's currently checking.

This patch adds support for logical to path resolving on commit roots and
makes scrub use that.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
This commit is contained in:
Jan Schmidt
2012-03-23 17:32:28 +01:00
parent 103e976616
commit 7a3ae2f8c8
4 changed files with 71 additions and 53 deletions
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4
fs/btrfs/ioctl.c
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@ -3067,8 +3067,8 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out;
extent_item_pos = loi->logical - key.objectid;
ret = iterate_extent_inodes(root->fs_info, path, key.objectid,
extent_item_pos, build_ino_list,
ret = iterate_extent_inodes(root->fs_info, key.objectid,
extent_item_pos, 0, build_ino_list,
inodes);
if (ret < 0)